摘要
以活性碳为载体,通过浸渍法制备了H9P2W15V3/C催化剂,对催化剂进行Uv-Vis、FT-IR表征。以对羟基苯甲酸丁酯的合成反应为探针,考察了催化剂的催化性能。研究了磷钨钒杂多酸负载量、催化剂用量、醇酸比、反应时间和反应温度对反应的影响。通过单因素实验和正交实验确定了反应的最佳条件:杂多酸负载量为30%,催化剂用量8.7%(按反应体系总质量计算),醇酸摩尔比2∶1,反应时间3h,反应温度125℃,酯化率可达91.30%。催化重复使用5次,酯化率仍可达76.42%。
Tungstovanadophosphoric heteropoly acid with tri-vanadium-substituted Dawson structure supported on activated carbon was prepared by impregnation method and characterized by FT-IR, Uv-Vis. The catalytic performance in synthesis of butyl p-hydroxy benzoate was investigated.The main effects of the reaction were optimized with simple and orthogonal fact experiments.The optimized conditions were as follows： the supported quantity was 30% ,the mass ratio of the catalyst to total reactant was 8.7%,the molar ratio of n-butyl alcohol to p-hydroxy benzoic acid was 2： 1, the reaction time was 3h, the reaction temperature was 125℃.Yield of butyl p-hydroxy benzoate could reach 9L30% under the optimum conditions.The catalyst could be reused for 5 times and the isolated yield of butyl p-hydroxy benzoate was still above 76.42%.
出处
《食品工业科技》
CAS
CSCD
北大核心
2012年第6期365-369,共5页
Science and Technology of Food Industry
基金
国家自然科学基金(21161009)
江西省自然科学基金(20114BAB213002,2009GQH0053)
江西省教育厅科技项目(GJJ10626,GJJ11613)
九江学院质量工程项目(10XSCXXSY48)
